Friday 23 July 2021

Nobels ODR-S - Special Overdrive

 Another overdrive from Nobels which shares a similar topology as ODR-1. But this one appears to a have a bit more gain on tap and a more flexible eq section. The mid control is powered by a transistor gyrator while the Lo and Hi controls are Bandaxall. And the hard clipping diodes are germaniums so you can choose your "magic fairytale" diodes in that spot.;-)

Schematic is avaiable HERE.




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8 comments:

  1. Mr.Baiser24 July 2021 at 00:24

    https://www.hagamps.com/
    has some very interesting pedals, most of them are original designs. And they publish the schematics inside the manuals...

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    1. fuzzhead24 July 2021 at 11:05

      wow, that is some out-of-the-box stuff there!
      Thanks for the link! Will definitely tak a look at these.

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  2. refused24 July 2021 at 02:26

    fuzzhead... would you consider some Mu-tron stuff?
    Mu-tron V - https://pcbguitarmania.com/wp-content/uploads/2020/03/Vutron-Building-Docs.pdf

    Phase II - https://www.pedalpcb.com/docs/PhaseII.pdf

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    1. fuzzhead24 July 2021 at 11:07

      Yes, I've been eyeing the Mutron V for a while so a layout will be done at some point.
      Phase II is a monster! It is doable but it may take a while until I'll give it a crack since flooded with stuff ATM...

      Delete
  3. Fatkeung13 November 2021 at 13:19

    Hello, can you do these two layout also by Nobels? My friend is asking me to build him these pedals but i don't know how to do the layout :<

    Nobrels Pre-C preamp
    https://elektrotanya.com/nobels_pre-c_preamp_eq_sch.pdf/download.html

    Nobels Distortion Special
    https://www.experimentalistsanonymous.com/diy/Schematics/Distortion%20Boost%20and%20Overdrive/Nobels%20DT-SN.pdf

    Thanks

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    1. fuzzhead14 November 2021 at 09:55

      I have unfinished layout for these so it will be uploaded at some pont. However, I'm having a break from building and drawing layouts at the moment so I can't tell you when they show up.

      Delete
  4. TedS1 March 2022 at 04:44

    Finished it today... tag it.

    This is a very high gain version of the ODR1, and the tone stack takes some getting used to to get good tones, but the layout works.

    I had to swap some resistor values to +/- 2K depending on where they were (too lazy to put them in series or parallel)

    I used a J113 for the Jfet and 2n5088 for the transistor, and 4558's for the OpAmps

    I also used a c50k for mid as I only had C and W 20K it seems to work okay.

    I hope to do the ODRC soon

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  5. TedS1 March 2022 at 16:06

    I also modded the circuit... just now.

    omit the diodes D3 and D4, put wires on row 9 col 1, and row 14 col 1 (the rows where the diodes were) and put them on the center terminals of an on/off/on dpdt switch.

    Then pair up the diodes you would have put in there (in parallel and with reversed polarity) and pick another pair to go on the other side.

    I have 1n60 and BAT41 diodes on there. You can maybe use 1n4148 but the BAT41 is almost not clipping. This gives you 2 more options.. on this already great sounding circuit.

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